50 lines
1.4 KiB
TypeScript
50 lines
1.4 KiB
TypeScript
import {derived, readable} from "svelte/store"
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import type {Readable} from "svelte/store"
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import {getIdFilters, getIdOrAddress} from "@welshman/util"
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import type {TrustedEvent} from "@welshman/util"
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import {network, roomPinLists} from "@app/core"
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import {deriveEventsForUrl} from "@app/repository"
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export const deriveRoomPinnedEvents = (url: string, h: string): Readable<TrustedEvent[]> =>
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readable<TrustedEvent[]>([], set => {
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const controller = new AbortController()
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roomPinLists.get().loadForRoom(url, h, controller.signal)
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const unsubscribe = derived<Readable<string[]>, TrustedEvent[]>(
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roomPinLists.get().pins(url, h).$,
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($pins, setEvents) => {
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if ($pins.length === 0) {
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setEvents([])
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return () => {}
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}
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const filters = getIdFilters($pins)
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network.get().load({relays: [url], filters, signal: controller.signal})
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return deriveEventsForUrl(url, filters).subscribe($events => {
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const byPin = new Map(
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$events.flatMap(event => [
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[event.id, event],
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[getIdOrAddress(event), event],
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]),
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)
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setEvents(
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$pins.flatMap(pin => {
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const event = byPin.get(pin)
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return event ? [event] : []
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}),
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)
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})
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},
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).subscribe(set)
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return () => {
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controller.abort()
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unsubscribe()
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}
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})
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